War does not select for "decent". It selects for "good at war", which is in many, probably most cases, the exact opposite of "decent". Don't encourage war. Don't encourage guerilla war. Don't encourage attacks designed to sow terror, i.e. terrorist attacks. Do not take the knife of evolution to the Gay Community™ and turn it into yet another militant organization- we've already had that, and it sucked. Do not literally rot out the connective tissue of society by suggesting that, hey, maybe violence is good, and the whole government monopoly on it is bad, and we should either ignore or hijack it.
Antifa wants violence, because they are optimized for war, not holding shit together before or afterward, and because they think they can win. There's a lot of shit about "Russia"- "Russia is playing us off against each other, they're posing as /pol/fags and SJWs, getting us to fight". Maybe so, but they're getting played just like we are. You don't "steer" a demon. The war-entity is using them, like it's using us, to generate more of itself.